A Wellington businessman has challenged Napier MP Stuart Nash's claims that a report into starting a new political party by National Party and Dirty Politics figure Simon Lusk was commissioned without his knowledge.
An 18-month-old email emerged this week, sent to the Labour MP from his campaign manager Rob Johnson.
Mr Johnson said in the email: "You had two friends of yours commission a report from Simon Lusk to the tune of 10 grand as to whether you could gain more influence by establishing your own political party in competition with Labour, or whether you should just essentially buy-off your colleagues."
Mr Nash said the email, though authentic, was the result of a misunderstanding.
Wellington businessman Troy Bowker and a man known only as "Ned" approached Mr Nash about starting a new political party. He said he told them he wasn't interested and, unbeknownst to him, they commissioned a report with Mr Lusk.